USE DIRECTIONS Initially use one bottle to a fuel tank and fill with fuel to achieve rapid cleanup. The treatment can be reduced on subsequent fillups to 1/3-1/6 oz per gallon (one bottle to 50-100 gallons) to provide continual injector and valve cleanliness. The detergents and antioxidants help prevent the formation of gum and varnish in gasoline, and the rust inhibitors prevent corrosion. Red Line SI-1 will not damage fuel system components and the combustion by-products do not cause corrosion of engine bearings as can many fuel additives. Red Line SI-1 is available in 15 ounce bottles, 5 gallon pails, and 55 gallon drums. Similar chemistry is available in a 6 ounce, less concentrated version called SI-2 Injector & Valve Detergent.